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2 years ago

Explain how knowing 1+7 helps you find the sum for 7+1

Mathematics

2 answers:

vovikov84 [41]2 years ago

8 0

Because they equal the same thing

valentinak56 [21]2 years ago

3 0

1+7 and 7+1 equal the same amount. It doesn't matter which position the number is in. The sum will be 8 either ways. Hope that helps :)

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In order to join an online learning community there is a $20 start up fee and a $5 monthly fee write an equation in slope interc

faust18 [17]

100 20 x 5 Try That!!

6 0

2 years ago

Approximate square root of 83 to to the nearest integer.

frez [133]

Answer:

9.1

Step-by-step explanation:

3 0

2 years ago

4.4.3 Quiz: Independence

lbvjy [14]

Answer:

$\frac{2}{15}$

Step-by-step explanation:

<h2>Lesson : Probability</h2><h2></h2>

We have a bag with 4 white chips and 6 black chips
Question : What is the probability of randomly choosing a white chip, not replacing it, and then randomly choosing another white chip?

4 white and 6 black

4 + 6 = 10

Choosing the first white chip : $\frac{2}{5}$

Since we took one out , now

3 white chips , 6 black chips

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Choosing another white chip : $\frac{1}{3}$

$\frac{2}{5} * \frac{1}{3}$

$\frac{2}{15}$

7 0

2 years ago

With a detailed explanation from the internet 1/(x-5)+3/(x+2)=4

irga5000 [103]

Answer:

$\boxed{ \sf x=\dfrac{4\pm\sqrt{43}}{2}}$

Explanation:

$\rightarrow \sf \dfrac{1}{x-5}+\dfrac{3}{x+2}=4$

make the denominators same

$\rightarrow \sf \dfrac{1(x+2)}{(x-5)(x+2)}+\dfrac{3(x-5)}{(x+2)(x-5)}=4$

join the fractions together

$\rightarrow \sf \dfrac{x+2+3x-15}{(x-5)(x+2)}=4$

cross multiply

$\rightarrow \sf x+2+3x-15=4(x-5)(x+2)$

simplify

$\rightarrow \sf 4x-13=4x^2-12x-40$

group the variables

$\rightarrow \sf 4x^2-16x-27 = 0$

use quadratic formula

$\rightarrow \sf x = \dfrac{-\left(-16\right)\pm \sqrt{\left(-16\right)^2-4\cdot \:4\left(-27\right)}}{2\cdot \:4}$

simplify the following

$\rightarrow \sf x=\dfrac{4\pm\sqrt{43}}{2}$

7 0

1 year ago

Read 2 more answers

The base of a solid in the region bounded by the parabola x2 + y = 4 and the line x + y = 2. Cross sections of the solid perpend

Evgen [1.6K]

Answer:

volume of the solid is 3.180

Step-by-step explanation:

given data

line x + y = 2

parabola x2 + y = 4

to find out

the volume of the solid

solution

we draw a graph between line and parabola as show in fig given below attach

line cut at (-1,3) and (2,0)

so the length of diameter is ( 4 - x²) - (2 - x)

and radius of this semi circle will be ( 4 - x² - 2 + x ) /2

radius = (-x² + x + 2 ) /2

and r(x) will be = (-x² + x + 2 ) /2

and A(x) will be = π ( r(x)² ) /2

we will integrate from -1 to 2

= $\int_{-1}^{2}A(x))$

= $\int_{-1}^{2}(π ( (-x² + x + 2 ) /2)² ) /2))$

= 81π / 20

volume of the solid is 3.180

4 0

3 years ago